Commit Graph

67 Commits

Author SHA1 Message Date
Michal Privoznik
66eaa887e9 Fix spacing around commas
On some places in the libvirt code we have:

  f(a,z)

instead of

  f(a, z)

This trivial patch fixes couple of such occurrences.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-08-22 15:03:39 +02:00
Michele Paolino
7ab2f81889 docs: Fix broken link in the HACKING page
The link to the page "how to get your code into an open source
project" has been fixed.

Signed-off-by: Michele Paolino <m.paolino@virtualopensystems.com>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-07-04 18:28:24 +02:00
Ján Tomko
058d89b9df Introduce virBufferCheckError
Check if the buffer is in error state and report an error if it is.

This replaces the pattern:
if (virBufferError(buf)) {
    virReportOOMError();
    goto cleanup;
}
with:

if (virBufferCheckError(buf) < 0)
    goto cleanup;

Document typical buffer usage to favor this.
Also remove the redundant FreeAndReset - if an error has
been set via virBufferSetError, the content is already freed.
2014-07-03 10:41:15 +02:00
Wangrui (K)
350f816a00 docs: fix a typo in hacking.html.in
Signed-off-by: Wang Rui <moon.wangrui@huawei.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
2014-06-10 08:53:03 -06:00
Ján Tomko
9af14dadf6 Add a rule for indenting labels
Indent top-level labels by one space.

Add the rule to HACKING and enforce it by syntax-check.
2014-03-25 14:58:41 +01:00
Eric Blake
78b139b0bd maint: enforce comma style usage
Enforce and document the style set up by the previous patches.

* build-aux/bracket-spacing.pl: Add comma checks.
* docs/hacking.html.in: Document the rules.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-11-20 09:24:18 -07:00
Chen Hanxiao
f7f469d09f doc: fix typo in HACKING
s/installion/installation

Signed-off-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
2013-10-07 09:42:33 +02:00
Eric Blake
70547bacae docs: mention VIR_TEST_RANGE
Commit ab92ae333 added a cool feature, but didn't document it.

* docs/hacking.html.in: Document debugging a subset of tests.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-08-12 20:44:41 -06:00
Eric Blake
70363ea9ff build: add configure option to disable gnulib tests
The gnulib testsuite is relatively stable - the only times it is
likely to have a test change from pass to fail is on a gnulib
submodule update or a major system change (such as moving from
Fedora 18 to 19, or other large change to libc).  While it is an
important test for end users on arbitrary machines (to make sure
that the portability glue works for their machine), it mostly
wastes time for development testing (as most developers aren't
making any of the major changes that would cause gnulib tests
to alter behavior).  Thus, it pays to make the tests optional
at configure time, defaulting to off for development, on for
tarballs, with autobuilders requesting it to be on.  It also
helps to allow a make-time override, via VIR_TEST_EXPENSIVE=[01]
(much the way automake sets up V=[01] for overriding the configure
time default of how verbose to be).

Automake has some pretty hard-coded magic with regards to the
TESTS variable; I had quite a job figuring out how to keep
'make distcheck' passing regardless of the configure option
setting in use, while still disabling the tests at runtime
when I did not configure them on and did not use the override
variable.  Thankfully, we require GNU make, which lets me
hide some information from Automake's magic handling of TESTS.

* bootstrap.conf (bootstrap_epilogue): Munge gnulib test variable.
* configure.ac (--enable-expensive-tests): Add new enable switch.
(VIR_TEST_EXPENSIVE_DEFAULT, WITH_EXPENSIVE_TESTS): Set new
witnesses.
* gnulib/tests/Makefile.am (TESTS): Make tests conditional on
configure settings and the VIR_TEST_EXPENSIVE variable.
* tests/Makefile.am (TESTS_ENVIRONMENT): Expose VIR_TEST_EXPENSIVE
to all tests.
* autobuild.sh: Enable all tests during autobuilds.
* libvirt.spec.in (%configure): Likewise.
* mingw-libvirt.spec.in (%mingw_configure): Likewise.
* docs/hacking.html.in: Document the option.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-08-12 10:02:38 -06:00
Yuri Chornoivan
5b4c035b08 Fix minor typos in messages and docs
Signed-off-by: Eric Blake <eblake@redhat.com>
2013-07-30 07:07:33 -06:00
Michal Privoznik
9021488a5b Adapt to VIR_ALLOC and virAsprintf in docs/ 2013-07-10 11:07:31 +02:00
Eric Blake
1e503ee534 build: honor autogen.sh --no-git
Based on a report by Chandrashekar Shastri, at
https://bugzilla.redhat.com/show_bug.cgi?id=979360

On systems where git cannot access the outside world, a developer
can instead arrange to get a copy of gnulib at the right commit
via side channels (such as NFS share drives), set GNULIB_SRCDIR,
then use ./autogen.sh --no-git.  In this setup, we will now
avoid direct use of git.  Of course, this means no automatic
gnulib updates when libvirt.git updates its submodule, but it
is expected that any developer in such a situation is already
prepared to deal with the fallout.

* .gnulib: Update to latest, for bootstrap.
* bootstrap: Synchronize from gnulib.
* autogen.sh (no_git): Avoid git when requested.
* cfg.mk (_update_required): Skip automatic rerun of bootstrap if
we can't use git.
* docs/compiling.html.in: Document this setup.
* docs/hacking.html.in: Mention this.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-07-09 16:15:29 -06:00
Eric Blake
040d3f7758 maint: tweak use of <a> in HACKING
The previous handling of <a> tags led to some less-than-ideal
layout in HACKING (most noticeable on a mid-sentence reference
to the valgrind home page).

* docs/hacking.html.in: Slight tweaks to <a> tags.
* docs/hacking1.xsl: Move <a> handling...
* docs/hacking2.xsl: ...here.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-07-09 11:49:20 -06:00
Eric Blake
134e685b1d syntax-check: mandate space after mid-line semicolon
Enforce the style cleanup in the previous patch.

* build-aux/bracket-spacing.pl: Enforce trailing spacing.
* cfg.mk (bracket-spacing-check): Tweak error wording.
* docs/hacking.html.in: Document the rule.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-28 08:26:05 -06:00
Eric Blake
6b74a9f5d9 string: make VIR_STRDUP easier to use
While reviewing proposed VIR_STRDUP conversions, I've already noticed
several places that do:

if (str && VIR_STRDUP(dest, str) < 0)

which can be simplified by allowing str to be NULL (something that
strdup() doesn't allow).  Meanwhile, code that wants to ensure a
non-NULL dest regardless of the source can check for <= 0.

Also, make it part of the VIR_STRDUP contract that macro arguments
are evaluated exactly once.

* src/util/virstring.h (VIR_STRDUP, VIR_STRDUP_QUIET, VIR_STRNDUP)
(VIR_STRNDUP_QUIET): Improve contract.
* src/util/virstring.c (virStrdup, virStrndup): Change return
conventions.
* docs/hacking.html.in: Document this.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-07 13:21:31 -06:00
Eric Blake
ddcfc5492a alloc: make VIR_APPEND_ELEMENT safer
VIR_APPEND_ELEMENT(array, size, elem) was not safe if the expression
for 'size' had side effects.  While no one in the current code base
was trying to pass side effects, we might as well be robust and
explicitly document our intentions.

* src/util/viralloc.c (virInsertElementsN): Add special case.
* src/util/viralloc.h (VIR_APPEND_ELEMENT): Use it.
(VIR_ALLOC, VIR_ALLOC_N, VIR_REALLOC_N, VIR_EXPAND_N)
(VIR_RESIZE_N, VIR_SHRINK_N, VIR_INSERT_ELEMENT)
(VIR_DELETE_ELEMENT, VIR_ALLOC_VAR, VIR_FREE): Document
which macros are safe in the presence of side effects.
* docs/hacking.html.in: Document this.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-07 13:21:31 -06:00
Michal Privoznik
c3abb5c459 virstring: Introduce VIR_STRDUP and VIR_STRNDUP
The code adaptation is not done right now, but in subsequent patches.
Hence I am not implementing syntax-check rule as it would break
compilation. Developers are strongly advised to use these new macros.
They are similar to VIR_ALLOC() logic: VIR_STRDUP(dst, src) returns zero
on success, -1 otherwise. In case you don't want to report OOM error,
use the _QUIET variant of a macro.
2013-05-05 12:08:54 +02:00
Eric Blake
1bf25ba249 docs: fix usage of 'onto'
http://www.uhv.edu/ac/newsletters/writing/grammartip2009.07.01.htm
(and several other sites) give hints that 'onto' is best used if
you can also add 'up' just before it and still make sense. In many
cases in the code base, we really want the two-word form, or even
a simplification to just 'on' or 'to'.

* docs/hacking.html.in: Use correct 'on to'.
* python/libvirt-override.c: Likewise.
* src/lxc/lxc_controller.c: Likewise.
* src/util/virpci.c: Likewise.
* daemon/THREADS.txt: Use simpler 'on'.
* docs/formatdomain.html.in: Better usage.
* docs/internals/rpc.html.in: Likewise.
* src/conf/domain_event.c: Likewise.
* src/rpc/virnetclient.c: Likewise.
* tests/qemumonitortestutils.c: Likewise.
* HACKING: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-04-19 14:31:16 -06:00
Osier Yang
06902a6f18 docs: Update HACKING
To tell libvirt-{qemu,lxc}.h shouldn't be included either.
2013-04-18 11:43:18 +08:00
Daniel P. Berrange
11d926659b Turn virSecurityManager into a virObjectLockable
To enable locking to be introduced to the security manager
objects later, turn virSecurityManager into a virObjectLockable
class

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-02-11 12:33:41 +00:00
John Ferlan
debe6fd22b HACKING: Sync with docs/hacking.html.in 2013-02-07 14:08:15 -05:00
Martin Kletzander
901f4b6b86 docs: aesthetical cleanups
Adding dots inside "exempli gratia" where missing.  While on that, I
took the liberty of changing it where found with simple grep.
2013-01-30 09:37:03 +01:00
Daniel P. Berrange
907a39e735 Add a test suite for validating SELinux labelling
There are many aspects of the guest XML which result in the
SELinux driver applying file labelling. With the increasing
configuration options it is desirable to test this behaviour.
It is not possible to assume that the test suite has the
ability to set SELinux labels. Most filesystems though will
support extended attributes. Thus for the purpose of testing,
it is possible to extend the existing LD_PRELOAD hack to
override setfilecon() and getfilecon() to simply use the
'user.libvirt.selinux' attribute for the sake of testing.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-01-14 13:40:04 +00:00
Eric Blake
a2acdb3dd2 docs: mention git rename detection
I've noticed a number of people sending patches with file
renames not compressed, so we might as well document how to
set this up.  (Git won't do it by default, for back-compat
reasons)

* docs/hacking.html.in: Add git config tip.
* HACKING: Regenerate.
2013-01-11 10:30:49 -07:00
Eric Blake
ed4bbe6bc4 docs: add some more hacking tips
Based on a suggestion by John Ferlan:
https://www.redhat.com/archives/libvir-list/2013-January/msg00158.html

* docs/hacking.html.in: Add some commit message instructions.
Mention the ./run script.
* HACKING: Regenerate.
2013-01-11 10:30:49 -07:00
Daniel P. Berrange
a3e95abeb5 Document bracket whitespace rules & add syntax-check rule
This documents the following whitespace rules

      if(foo)   // Bad
      if (foo)  // Good

      int foo (int wizz)  // Bad
      int foo(int wizz)   // Good

      bar = foo (wizz);  // Bad
      bar = foo(wizz);   // Good

      typedef int (*foo) (int wizz);  // Bad
      typedef int (*foo)(int wizz);   // Good

      int foo( int wizz );  // Bad
      int foo(int wizz);    // Good

There is a syntax-check rule extension to validate all these rules.
Checking for 'function (...args...)' is quite difficult since it
needs to ignore valid usage with keywords like 'if (...test...)'
and while/for/switch. It must also ignore source comments and
quoted strings.

It is not possible todo this with a simple regex in the normal
syntax-check style. So a short Perl script is created instead
to analyse the source. In practice this works well enough. The
only thing it can't cope with is multi-line quoted strings of
the form

 "start of string\
more lines\
more line\
the end"

but this can and should be written as

 "start of string"
 "more lines"
 "more line"
 "the end"

with this simple change, the bracket checking script does not
have any false positives across libvirt source, provided it
is only run against .c files. It is not practical to run it
against .h files, since those use whitespace extensively to
get alignment (though this is somewhat inconsistent and could
arguably be fixed).

The only limitation is that it cannot detect a violation where
the first arg starts with a '*', eg

   foo(*wizz);

since this generates too many false positives on function
typedefs which can't be supressed efficiently.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-11-02 14:00:32 +00:00
Ján Tomko
149c87b49d Various typos and misspellings 2012-10-12 00:03:43 +02:00
Doug Goldstein
07cbb610ba Update how to compile with -Werror
--enable-compile-warnings=error has been renamed to --enable-werror so
update the HACKING and the hacking.html to reflect that.
2012-09-25 09:12:01 -06:00
Eric Blake
f36fadca10 build: avoid dirty docs on fresh bootstrap
* HACKING: Regenerate.
2012-09-11 15:26:10 -06:00
Laine Stump
7038322991 docs: point out git send-email location, be more stern about make check
An email came to libvir-list wondering why the git send-email command
was missing in spite of having git installed; this is due to the
send-email command being in a sub-package of the main git package.

While touching the hacking file, I thought it would be useful to 1)
indicate the location of the source (docs/hacking.html.in) in the
message at the top of HACKING, and also to make the note about running
"make check" and "make syntax-check" a bit more stern.
2012-09-08 23:20:29 -04:00
Michal Privoznik
a8d63a485e docs: Improve patch submission guidelines
We should really advise (new) developers to send rebased patches
that apply cleanly and use git-send-email rather than all other
obscure ways.
2012-07-16 11:05:12 +02:00
Guido Günther
3addd15195 Document STREQ_NULLABLE and STRNEQ_NULLABLE 2011-10-06 16:50:38 +02:00
Eric Blake
8e22e08935 build: rename files.h to virfile.h
In preparation for a future patch adding new virFile APIs.

* src/util/files.h, src/util/files.c: Move...
* src/util/virfile.h, src/util/virfile.c: ...here, and rename
functions to virFile prefix.  Macro names are intentionally
left alone.
* *.c: All '#include "files.h"' uses changed.
* src/Makefile.am (UTIL_SOURCES): Reflect rename.
* cfg.mk (exclude_file_name_regexp--sc_prohibit_close): Likewise.
* src/libvirt_private.syms: Likewise.
* docs/hacking.html.in: Likewise.
* HACKING: Regenerate.
2011-07-21 10:34:51 -06:00
Eric Blake
68ea80cfdd maint: rename virBufferVSprintf to virBufferAsprintf
We already have virAsprintf, so picking a similar name helps for
seeing a similar purpose.  Furthermore, the prefix V before printf
generally implies 'va_list', even though this variant was '...', and
the old name got in the way of adding a new va_list version.

global rename performed with:

$ git grep -l virBufferVSprintf \
  | xargs -L1 sed -i 's/virBufferVSprintf/virBufferAsprintf/g'

then revert the changes in ChangeLog-old.
2011-05-05 13:47:40 -06:00
Eric Blake
06732e1a7d docs: mention C89 syntax preferences
* docs/hacking.html.in (Code formatting): Document that // comment
and declaration-after-statement are discouraged.
* HACKING: Regenerate.
2011-03-30 13:51:22 -06:00
Hu Tao
838f669682 Add vim configuration that makes vim auto-indent code 2011-03-17 17:08:51 -06:00
Eric Blake
1000d9c2b0 maint: document dislike of mismatched if/else bracing
* docs/hacking.html.in (Curly braces): Tighten recommendations to
disallow if (cond) one-line; else { block; }.
* HACKING: Regenerate.
Suggested by Daniel P. Berrange.
2011-01-05 11:05:28 -07:00
Jiri Denemark
5414d6b6ae doc: Fix spelling of virBufferVSprintf 2010-11-25 18:14:58 +01:00
Eric Blake
149c492137 libvirtd: fix bug when shrinking number of clients
* daemon/libvirtd.c (qemudRunLoop): Pass allocation size, not
current count, to VIR_SHRINK_N.
* docs/hacking.html.in: Update doc example.
* HACKING: Regenerate.
2010-11-23 08:43:00 -07:00
Eric Blake
269d3b72f6 memory: make it easier to avoid quadratic scaling of arrays
* src/util/memory.h (VIR_RESIZE_N): New macro.
* src/util/memory.c (virResizeN): New function.
* src/libvirt_private.syms: Export new helper.
* docs/hacking.html.in: Document it.
* HACKING: Regenerate.
2010-11-18 12:17:49 -07:00
Eric Blake
5a0beacc12 memory: make it safer to expand arrays
* src/util/memory.h (VIR_REALLOC_N): Update docs.
(VIR_EXPAND_N, VIR_SHRINK_N): New macros.
(virAlloc, virAllocN, virReallocN, virAllocVar, virFree): Add some
gcc attributes.
* src/util/memory.c (virExpandN, virShrinkN): New functions.
(virReallocN): Update docs.
* src/libvirt_private.syms: Export new helpers.
* docs/hacking.html.in: Prefer newer interfaces over
VIR_REALLOC_N, since uninitialized memory can bite us.
* HACKING: Regenerate.
2010-11-18 12:11:43 -07:00
Eric Blake
e8aba782e7 maint: avoid remaining sprintf uses
* cfg.mk (sc_prohibit_sprintf): New rule.
(sc_prohibit_asprintf): Avoid false positives.
* docs/hacking.html.in (Printf-style functions): Document the
policy.
* HACKING: Regenerate.
* .x-sc_prohibit_sprintf: New exemptions.
* Makefile.am (syntax_check_exceptions): Ship new file.
* src/vbox/vbox_tmpl.c (vboxStartMachine, vboxAttachUSB): Use
virAsprintf instead.
* src/uml/uml_driver.c (umlOpenMonitor): Use snprintf instead.
* tools/virsh.c (cmdDetachInterface): Likewise.
* src/security/security_selinux.c (SELinuxGenSecurityLabel):
Likewise.
* src/openvz/openvz_driver.c (openvzDomainDefineCmd): Likewise,
and ensure large enough buffer.
2010-11-17 10:13:12 -07:00
Stefan Berger
7b7cb1ecc9 deprecate fclose() and introduce VIR_{FORCE_}FCLOSE()
Similarly to deprecating close(), I am now deprecating fclose() and
introduce VIR_FORCE_FCLOSE() and VIR_FCLOSE(). Also, fdopen() is replaced with
VIR_FDOPEN().

Most of the files are opened in read-only mode, so usage of
VIR_FORCE_CLOSE() seemed appropriate. Others that are opened in write
mode already had the fclose()<  0 check and I converted those to
VIR_FCLOSE()<  0.

I did not find occurrences of possible double-closed files on the way.
2010-11-16 21:13:29 -05:00
Matthias Bolte
34ed4e9809 Generate HACKING from docs/hacking.html.in 2010-11-12 19:47:20 +01:00
Stefan Berger
f04de501bc Introduce VIR_CLOSE to be used rather than close()
Since bugs due to double-closed file descriptors are difficult to track down in a multi-threaded system, I am introducing the VIR_CLOSE(fd) macro to help avoid mistakes here.

There are lots of places where close() is being used. In this patch I am only cleaning up usage of close() in src/conf where the problems were.

I also dare to declare close() as being deprecated in libvirt code base (HACKING).
2010-10-19 10:23:51 -04:00
Jim Meyering
44258473b8 docs: hacking: explain why using curly braces well is important
* docs/hacking.html.in: Use the "curly braces" section from coreutils'
HACKING, adapting for libvirt's different formatting style.
* HACKING: Sync from the above, still mostly manually.
2010-05-04 15:41:21 +02:00
Jim Meyering
d1c754168a doc: fix typos in hacking.html.in; mark HACKING as read-only
* HACKING: Mark as read-only.  Soon we'll generate it from...
* docs/hacking.html.in: ... this file.  More typo fixes.
2010-03-09 18:18:20 +01:00
Jim Meyering
2a13ecc9be doc: fix more typos in HACKING
* HACKING: More spelling/typo fixes.
2010-03-09 17:26:24 +01:00
Eric Blake
095375925e hacking: add a section on preprocessor conventions
* doc/hacking.html.in (preprocessor): New section to document
recently-discussed style issues.

Signed-off-by: Eric Blake <eblake@redhat.com>
2010-03-09 17:07:15 +01:00
Eric Blake
0be3783316 hacking: fix typos
* docs/hacking.html.in (committers): Fix spelling and grammar.
2010-03-09 17:01:20 +01:00